Coordination and Response

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Across
  1. 2. Senses change in environment
  2. 3. clefts Small gaps between pairs of neurones
  3. 5. A part of the eye that contains the receptor cells and is sensitive to light
  4. 9. Responds to stimulus by contracting
  5. 11. An example of a involuntary action
  6. 14. An action that's decided by ourselves
  7. 16. A part of the eye located in the front of th lens, containing pigments to absorb light
  8. 18. A group of receptor cells that responds to spesific stimuli
  9. 19. Changes in a organism's environment are called receptors
  10. 20. Vacuoles containing neuro transmitter
Down
  1. 1. A part of the retina that contains the most receptor cells
  2. 4. A living thing's system that functions to respond to stimuli
  3. 6. An action of the body without being consciously aware of it
  4. 7. The longest fibre in the nervous system
  5. 8. a layer of fat and protein wrapping the nerver fibre in some animals
  6. 10. A receptor that are able to distinguish color
  7. 12. Dilation of the pupils to adjust amount of light entering
  8. 13. A junction between pairs of nerve cells
  9. 15. Electrical signals from neurones
  10. 17. cells A receptor that are sensitive to dim light but not color